I have a 1980 40 HP Merc Thunderbolt. Came on boat I bought last year. Went to do spring maintenance and realized I have no idea how to get cover off. There is a panel in the front with a lever, once you remove that you are looking at two latches that hold a cowling band on that goes around the motor. How do you release these two latches that hold the band? Must have spent an hour on it today, has me baffled. Thanks.